<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>my-demo</title>
    <link rel="shortcut icon" type="image/x-icon" href="favicon.ico"/>
    <style>
      html,
    body,
    #app {
      height: 100%;
      width: 100%;
      margin: 0;
      padding: 0;
    }
    </style>
  </head>
  <body>
    <div id="app"></div>
  </body>
</html>
